LG L15V26 - 30 Audio Flowchart

Directview LCD Training 28 Circuit Descriptions
CIRCUIT DESCRIPTIONS
30” AUDIO
FLOWCHART
PCB
TROUBLESHOOTING DIAGRAM
Audio
Processor
Audio Inputs
(Composite, RF, PC)
Composite
Audio
Amplifier
Speakers
No Sound
Check volume
level and mute
Check voltages of
the Reset IC (IC603)
Check voltages of
Audio Processor
(IC601)
Replace Reset IC
(IC603)
Replace Audio
Processor (IC601)
Check B+ voltages
of Audio Amps
(IC604/605)
Check Power
Supply
Problem lies
elsewhere
Ok
Present
Present
AbsentPresent
Absent
Absent